Method of molding car-wheels



(No Model.) 3 SheetsSheet 1.

J. J. CARR.

METHOD OF MOLDING GAR WHEELS.

No. 360,086. Patented Mar. 29, 1887.

Fig. 2.

T l/itn gsses Int anion (No Model.) a Sheets- Sheet 2.

J. J. CARR.

METHOD OF MOLDING GAR WHEELS. No. 360,086. Patented Mar. 29, 1887* minesses: V Int/anion 260W W 5M paw-QM QZMW Nv Pzmzs FMwLitMqrapMr, Washingtm o. c

(No Model.) 3 SheetsSheet 3.

- J. J. CARR.

METHOD OF MOLDING GAR WHEELS.

No. 360,086. Patented Mar. 29, 1887.

Fig. 12.

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TUNITED STATES PATENT FrcE.

JOSEPH J. CARR, OF \VILKES-BARRE, PENNSYLVANIA.

METHQD OF MOLDING CAR-WHEELS.

SPECIFICATION forming part of Letters Patent No. 360,086,61ated Marci: 29, 1887.

Application tiled July 2, ISFG. Serial No. 206,914.

To a ZZ whom it may concern.-

Be it known that I, JOSEPH J. CARR, a citizen of the United States, residing at \Vilkes- Barre, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Molding Oar-\Vheels and Similar Objects, of which the following is a specification.

My invention relates to improvements in that method of making molds for casting carwheels, pulleys, and similar objects in which the pattern is pressed into the sand, making an imprint, and at the same time ramming or compressing the sand.

The objects of my improvements are to so form the pattern and mold that the sand will be evenly rammed and the mold clean and well defined, and to furnish a method by which wheels may be molded faster and much cheaper than by the methods now in vogue. I attain these objects in the manner shown in the ac companying drawings, in which- Figure 1 is a section through a mold containing a casting of a double-plate car-wheel, and the following views illustrate my method ofmaking such a mold. Fig. 2 is a section through that part of the flask known as the drag, partially filled with sand preparatory to receiving the impression from the pattern. Fig. 3 is the same with part of the pattern thrust into the sand. Fig. 4 is the same as Figs. 2 and 3, with the remaining portion of the pattern pressed upon the sand. Fig. 5 is the cope with sand ready to receive the impression from the pattern. Fig. 6 is the same with the sand compressed or rammed by the pattern. Fig. 7 is a plan view of one part of the drag-pattern. Fig. 8 is a section through the same on the line A B. Fig. 9 is a plan view of the other part of the drag-pattern, and Fig. 10 is a section through line QD. Fig. 11 is a plan view of cope-pattern. Fig. 12 is a flask containing sand and illustrating the manner in which the pressure is equalized in rammlng.

Similar letters refer to similar parts throughout the several views.

F, Fig. 2, is the flask in which that part of the mold known as the drag is formed. f is an extension, which keeps the sand in place To make this part until the mold is formed.

(No model.)

of the mold,I fill in and distribute the sand by hand or any suitableimechanical device with a varying depth corresponding roughly to its final depth in the mold,and strike with a sweep conforming or approximating to the contour of the pattern,thus further and more perfectly distributingand shaping the surface of the sand to the exact contour required. As the mold is to be rammed by the pressure of the patterns depressing the sand a certain distance relative to its face, it is evident that theportion a will be softer and not so compact as at b. To obviate this, and to obtain a uniform density throughout the mold, the sand may be distributed and shaped by the sweep,with an excess at a of the amount required to conform to the contour of the pattern, as at 12 Figs. 2, 5, and 12. The amount of such excess in any part of the mold is to be graduated proportionate to the depth of sand in the mold and the pressure applied to compact it. This excess of sand will cause the parts having such excess, as at a, to be compacted to the same degree as the thin parts at b, when compressed by the pattern; or the same result may be obtained by making the mold board or bottom to conform to the contour of the face of the mold, as shown by the dotted line 8 s, Fig. 2. This will make the sand of uniform thickness throughout the flask, and consequently it will be rammed evenly. On the drag side of the wheel are ribs 9, radiating from the direction of the hub and projecting from the plate It and rim i. \Vere these ribs on the pattern and pressed into the sand at the same time that the sand was rammed by the plate It, the sand would be compressed more under the ribs than between them, and would not make a uniform mold. To obviate this I make the pattern in two parts, Figs. 3 and 4, and detailed in Figs. 7, 8, 9, and 10.

The pattern I is provided with a rim, i, corresponding to the rim i of the wheel, and an extension, i and ribs or blades g, projecting inward from the ring and corresponding to ribs 9 on the wheel. The pattern H is a plate, h, corresponding to the plate h of the wheel, and is provided with slots h", to allow the ribs on the pattern I to pass through. By pressing the pattern I into the sand while in a light and loose condition the ribs 9 cut the sandwithout compressing it to any great extent, and

the rim t" and ring i serve to confine the sand in place to receive the pressure from the pattern of the plate, while the extension i presses the sand down even or flush with the top of the flask. The pattern I remains in the sand until the pattern H is pressed down between the ribs 9 to the dotted line 6, Figs. 2 and 3, and as at Fig. 4. The pattern I is then removed, while the pattern H serves to hold the sand intact until the ribs 9 are withdrawn, after which the plate, hub, and core-print H can be withdrawn and the banking frame or extension f removed.

The order in which the foregoing is accom- 'plished is briefly as follows: The sand is prepared in the flask, then receives an impression from and retains the pattern I, receives an impression from the pattern H, the pattern I is withdrawn, and finally the pattern H is re-- moved.

The cope N is formed in asimilar way, with the exception that as there are no ribs on the cope side of the wheel the pattern J is made in one part, as in Figs. 6 and 11. The sand is filledjnto the flask, distributed, and shaped in precisely the same way as in the drag, to conform to the contour of the pattern, with such excess of sand in certain parts, as before described. Figs. 5 and 6 show the cope provided with achill, w, which may be used or dispensed with.

Any other form of wheel may be molded with equal facility, whether with or without ribs or arms, and the method of equalizing the pressure on the sand is equally applicable to a great variety of forms for castings.

The patterns used for any other form of casting are made to suit such other shapes, but are adapted to be used in the same manner as those herein described, and are therefore in this respect equivalent to them.

I do not claim any particular device for opcrating the patterns and applying pressure to the sand; but

What I do claim, and wish to secure by Let ters Patent, is'

1. The means for forming molds for casting car-wheels or other objects, comprising the combination of a flask, F, extension f, a pat tern, and molding material distributed with an excess of said material at certain parts to have approximately the shape of the pattern, substantially as described.

2. A method of molding car-wheels or other objects, consisting'in distributing and shaping sand or other molding material contained in a suitable flask to approximate in form the contour of the object molded, with an excess of molding material in such parts of the mold as contain the greater depth of the said molding material, and then compressing said material to the required uniform density, in the manner described.

3. The means for molding car-wheels or other objects, comprising the combination of a suitable flask and molding material distrib sion f, molding material with an excess graduated proportionate to the depth of material in the mold, and the patterns adapted to define and compress it for use, in the manner herein specified. V

5. Means for forming molds for casting carwheels or other objects, comprising the combination of a suitable flask, sand or other molding material distributed and shaped with reference to its final form, with such excess of sand in parts as will equalize the pressure, and patterns adapted to compress the sand a certain amount relative to the face of the mold, substantially as described.

6. As a means for molding car-wheels, the flask F, with its bottom shaped like the face of the mold, sand equally distributed over said bottom, and the patterns H and I, for use in the manner herein specified.

7. Means for molding car-wheels, comprising the combination of a flask containing sand distributed to equalize the pressure required to compact it, and the pattern I, having ribs or blades g and the rim 2', substantially as described, and for the purpose specified.

8. Means for molding car-wheels, comprising the combination of the flask F, containing sand distributed proportionate to its depth in the mold and to the pressure required to compress it, and the pattern I and pattern H,

adapted to operate substantially as described.

9. Means for molding car-wheels, comprising the combination of a flask containing sand distributed to approximate to the contour of the pattern and to equalize the pressure necessary to compress it to its final form, the pattern I, consisting of the rim and ribs orother projecting parts of the wheel, and the pattern H, consisting of the core-print, hub, and plate, the whole adapted to be used and manipulated substantially as herein described.

10. Means for molding car-wheels, comprising a flask containing sand distributed to equalize the pressure applied to compact it,

- the pattern I, with rim i, extension 6, ribs or blades g,and pattern H, having slots h, adapted to be used substantially as described.

11. A method of molding car-wheels, consisting of pressing a pattern of the rim and ribs or arms into and upon a bed of sand distributed to approximate the form of one side of the wheel, and then defining and compacting the remainder of the sand by pressing upon it while still holding the rim and rib pattern a pattern of the core-print, hub, and plate, and then Withdrawing the rim and rib pattern, and finally removing the hub and plate pattern.

12. A method of molding car-wheels, conpressing the sand to any great extent,and then :0 sisting of distributing and shaping molding applying another pattern in conjunction with material to produce a surface contour correthe first pattern to define and compact the sponding to the shape of the wheel, but with mold.

an excess in certain parts to compensate for the difierence in mold depth, and to equalize JOSEPH CARR?- the pressure required to compact the mate- W'itnesses:

rial, applying a pattern to imprint the pro- PATK.1\/IOGUIGAN,

truding portions of the wheel without com- RICHARD MoRRIs. 

